[solution] Unable to bind: Address already in use

When trying to run an app if you are getting the error “Unable to bind: Address already in use”, you can use this command on linux to check which process is already using that port:

netstat -tulpn

Then you can kill the process with:

kill <pid>

If you are on windows you can check the port usage with:

netstat -a -o -n

And kill process on windows with:

taskkill /F /PID <pid>